398 
neath  ;  antennae  and  legs  ochraceous  ;  anal  valves  with  ferruginous  tinge. 
Head  smooth  and  shining,  the  vertical  sulcus  obsolete  in  the  middle, 
visible  above  and  deep  below  ;  two  punctures  on  each  side  of  the  la- 
brum.  Eyes  large  composed  of  upwards  of  40  ocelli  arranged  in  6 
transverse  series;  the  distance  between  them  equal  to  about  a  dia- 
meter and  a  half. 
Antennae  long,  considerably  longer  than  the  head,  the  two  distal 
segments  hairy. 
First  tergite  with  its  lateral  angle  acute  and  narrowed,  the  apex, 
however ,  rounded ,  with  only  an  anterior  marginal  sulcus.  The  second  not 
or  hardly  projecting  below  the  level  of  the  first.  The  rest  of  the  somites 
without  the  scobina,  the  transverse  sulcus  obsolete  above,  visible  at  the 
sides,  the  middle  of  each  somite  depressed,  i.e.  lower  than  the  an- 
terior and  posterior  portions,  the  posterior  portion  smooth  or  finely 
rugulose  and  polished,  the  anterior  portion  also  smooth.  The  pores 
minute,  above  the  middle  of  the  side,  behind  the  transverse  depression 
of  the  somites  but  just  upon  the  superior  termination  of  the  lateral 
sulcus.  Anal  somite  smooth,  angled  above,  the  angle  covering  the 
valves  but  not  surpassing  them,  not  constricted  at  the  base;  the 
valves  with  their  margins  somewhat  strongly  compressed. 
Legs  long  and  without  pads. 
Copulatory  feet  as  figured. 
Number  of  somites  48. 
Length  53  mm.;  width  4. 
Spirobolellus  nov. 
Species  of  small  size ,  longitudinally  banded  with  pale  colour. 
Eyes  large,  subcircular,  widely  separated. 
Antennae  short,  1st  segment  as  large  as  the  2Qd  (?  always). 
Frontal  sulcus  weak. 
Labral  pores  4  +  4. 
Collum  large,  extending  laterally  as  low  as  the  2Qd. 
The  transverse  sulcus  obsolete  at  least  dorsally,  its  place  taken 
by  a  groove  which  is  situated  in  front  of  the  pore  and  gives  the 
appearance  described  as  the  pore  being  situated  behind  the  sulcus; 
the  area  behind  the  groove  elevated.  Sterna  striate.  Scobina  absent 
(?  always). 
Last  segment  of  the  legs  not  padded  in  the  cf. 
